letsxplor
01-04-2009, 01:34 PM
I did it! :ecstasy:
Earlier this year I got BC Predator exhaust put on Lubelle, and, since I was scared to mess with the carbs, I paid to have the pipes installed and the main jets changed to what conventional wisdom said was a good starting point. She's been running and sounding much better than she once did, :devillaugh: but I still think I'm a little lean on the main, and I knew I needed more fuel on the pilot.
There's a pilot screw that can be accessed w/out disassembling anything, and a pilot jet that's located under the float bowl. I had turned the screw out and still couldn't get the de-cel popping to go away. I decided to change the pilot jet from a 40 to a 42. I checked all the resources online, and found there are at least two ways of going about this - removing the carbs, or just removing the float bowls with the carbs still on the bike. Sounded a lot easier to leave the carbs on the bike, that's what I was shooting for.
The jets are tiny - and the pilots are longer than the mains.
http://i143.photobucket.com/albums/r126/letsxplor/0103/pilots.jpg
First, I drained the carbs.
http://i143.photobucket.com/albums/r126/letsxplor/0103/drain.jpg
Then I removed the float bowls. When I had the main jets changed out I replaced the alum philips screws with stainless steel allen bolts so it went pretty smoothly, except for one bolt on the left-hand side that was a little persnickety. Then I realized I had an issue - there wasn't enough clearance to get any of my screwdrivers that would fit in the recessed hole that holds the pilot jet.
Here's a pic of the underside of the carbs from dinqua.com. The pilot jet is in the hole that between the two sides of the float, recessed about .75".
http://i143.photobucket.com/albums/r126/letsxplor/0103/bottomcarbs.jpg
Ok, guess I'll have to take the carbs off. I remove the seat and the tank.
http://i143.photobucket.com/albums/r126/letsxplor/0103/neck-id.jpg
Start loosening things then realize I'm gonna have to move that airbox in order to get the carbs off. Nah, there's gotta be a better way. Hmm...:chin: I just need a better tool! And I have a hacksaw...
Voila! I now have a carb-tuning tool! :ecstasy:
http://i143.photobucket.com/albums/r126/letsxplor/0103/carbtool2.jpg
:D:
http://i143.photobucket.com/albums/r126/letsxplor/0103/carbtool.jpg
Get the jets changed, everything back together, time to crank her up. Rev a few times... NO POPPING... :yahoo: :smiley:
Next on the agenda - test ride. Inside, gear up, head out back... and... :wtf::badday:RAIN??!!!!!!! Check the weather map, on teensy dot of green, right over my house! Figures...
Oh well, gives me time to post these pics. And I think the raincloud has passed now... time for a RIDE!!
Earlier this year I got BC Predator exhaust put on Lubelle, and, since I was scared to mess with the carbs, I paid to have the pipes installed and the main jets changed to what conventional wisdom said was a good starting point. She's been running and sounding much better than she once did, :devillaugh: but I still think I'm a little lean on the main, and I knew I needed more fuel on the pilot.
There's a pilot screw that can be accessed w/out disassembling anything, and a pilot jet that's located under the float bowl. I had turned the screw out and still couldn't get the de-cel popping to go away. I decided to change the pilot jet from a 40 to a 42. I checked all the resources online, and found there are at least two ways of going about this - removing the carbs, or just removing the float bowls with the carbs still on the bike. Sounded a lot easier to leave the carbs on the bike, that's what I was shooting for.
The jets are tiny - and the pilots are longer than the mains.
http://i143.photobucket.com/albums/r126/letsxplor/0103/pilots.jpg
First, I drained the carbs.
http://i143.photobucket.com/albums/r126/letsxplor/0103/drain.jpg
Then I removed the float bowls. When I had the main jets changed out I replaced the alum philips screws with stainless steel allen bolts so it went pretty smoothly, except for one bolt on the left-hand side that was a little persnickety. Then I realized I had an issue - there wasn't enough clearance to get any of my screwdrivers that would fit in the recessed hole that holds the pilot jet.
Here's a pic of the underside of the carbs from dinqua.com. The pilot jet is in the hole that between the two sides of the float, recessed about .75".
http://i143.photobucket.com/albums/r126/letsxplor/0103/bottomcarbs.jpg
Ok, guess I'll have to take the carbs off. I remove the seat and the tank.
http://i143.photobucket.com/albums/r126/letsxplor/0103/neck-id.jpg
Start loosening things then realize I'm gonna have to move that airbox in order to get the carbs off. Nah, there's gotta be a better way. Hmm...:chin: I just need a better tool! And I have a hacksaw...
Voila! I now have a carb-tuning tool! :ecstasy:
http://i143.photobucket.com/albums/r126/letsxplor/0103/carbtool2.jpg
:D:
http://i143.photobucket.com/albums/r126/letsxplor/0103/carbtool.jpg
Get the jets changed, everything back together, time to crank her up. Rev a few times... NO POPPING... :yahoo: :smiley:
Next on the agenda - test ride. Inside, gear up, head out back... and... :wtf::badday:RAIN??!!!!!!! Check the weather map, on teensy dot of green, right over my house! Figures...
Oh well, gives me time to post these pics. And I think the raincloud has passed now... time for a RIDE!!